

As a plug-and-play product, that's pretty much all you need to do to set it up, other than fill it with water. The Plunge plugs into a standard wall outlet. Bear in mind the upgrades are pricey, but the Standard Plunge is an excellent product.

There's also a hot/cold version that heats and cools the water. (Both sizes are relatively large, so this isn't the best option for small spaces.) If you live in a particularly hot climate, you might consider getting the Plunge Pro, which is a little better at maintaining cold temps. But people taller than 6 feet should consider getting the XL, which is 6 inches longer and 4 inches wider than the Standard version. The attractive angular tub is big enough for one adult. Once you fill the self-contained design with a hose, you can continue to use the water for up to six months. The water continuously circulates while a micron filter pulls out debris, and an oxidizer keeps contaminants at bay. It leans on powerful cooling, sanitation, and filtration systems to provide you with cold and clean water at all times. If you ask us, the best cold plunge tub is the Plunge.

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